请教一下,
如果使用PHP+Mysql,
想从数据库搜索出符合要求的数据,顺序随机显示,并分页显示。如果要想让数据不重复,特别是不同的页,不能有相同的数据,
请问如何实现?
(目前遇到的问题是:不同的分页,有的数据是相同的)
谢谢!
回复讨论(解决方案)
你之前有重复,估计你是用order by rand(); 后分页导致的。
要做到随机不重复,可以这样做,用一个临时文件,记录已经使用过的id,在下一次select时排除。
先将随机的结果集全部存入临时表
然后再对临时表分页
相同的种子将产生相同的随机数序列
由 ...... order by rand()
变为 ......order by rand( n)
并用你认为合适的方式保存种子 n
谢谢大家,已给分

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